Builds SwiftUI views with modern MV architecture, state management, and view composition patterns. Covers @Observable ownership rules, @State/@Bindable/@Environment wiring, view decomposition, custom ViewModifiers, environment values, async data loading with .task, iOS 26+ APIs, Writing Tools, and performance guidelines. Use when structuring a SwiftUI app, managing state with @Observable, composing view hierarchies, or applying SwiftUI best practices.
Audit and improve SwiftUI runtime performance. Use when diagnosing slow rendering, janky scrolling, high CPU, memory usage, excessive view updates, layout thrash, body evaluation cost, identity churn, view lifetime issues, lazy loading, Instruments profiling guidance, and performance audit requests.
Manage Apple Calendar on macOS with the `nucleus-apple` CLI. Use when the task involves checking availability, listing event windows, creating events, editing one event or future recurring events, moving events across calendars, or deleting Calendar events.
Query and analyze exported Apple Health metrics and raw samples with the `nucleus-apple` CLI. Use when the task involves trend summaries, daily metrics, raw sample inspection, sync change history, or diagnosing gaps between aggregates and raw exports.
Manage Apple Notes on macOS with the `nucleus-apple` CLI. Use when the task involves searching notes, scoping by account or folder, reading note bodies, creating notes, appending or replacing note content, or adding and exporting note attachments.
Manage Apple Reminders on macOS with the `nucleus-apple` CLI. Use when the task involves filtering reminders by due or start dates, listing reminder lists, creating reminders, editing or moving reminders, marking them complete or incomplete, or deleting reminders.